/* PipeWire */
/* SPDX-FileCopyrightText: Copyright © 2018 Wim Taymans */
/* SPDX-License-Identifier: MIT */

#include <string.h>
#include <stddef.h>
#include <stdio.h>
#include <errno.h>
#include <unistd.h>
#include <time.h>

#include <spa/monitor/device.h>
#include <spa/monitor/utils.h>
#include <spa/pod/filter.h>
#include <spa/pod/parser.h>
#include <spa/debug/types.h>

#include <pipewire/impl.h>

struct impl {
	struct pw_context *context;
	struct pw_impl_device *device;
	struct spa_hook device_listener;

	struct pw_resource *resource;
	struct spa_hook resource_listener;
	struct spa_hook object_listener;

	unsigned int registered:1;
};

static void device_info(void *data, const struct spa_device_info *info)
{
	struct impl *impl = data;
	if (!impl->registered) {
		pw_impl_device_set_implementation(impl->device,
				(struct spa_device*)impl->resource);
		pw_impl_device_register(impl->device, NULL);
		impl->registered = true;
	}
}

static const struct spa_device_events object_events = {
	SPA_VERSION_DEVICE_EVENTS,
	.info = device_info,
};

static void device_resource_destroy(void *data)
{
	struct impl *impl = data;

	pw_log_debug("client-device %p: destroy", impl);

	impl->resource = NULL;
	spa_hook_remove(&impl->device_listener);
	spa_hook_remove(&impl->resource_listener);
	spa_hook_remove(&impl->object_listener);
	pw_impl_device_destroy(impl->device);
}

static const struct pw_resource_events resource_events = {
	PW_VERSION_RESOURCE_EVENTS,
	.destroy = device_resource_destroy,
};

static void device_destroy(void *data)
{
	struct impl *impl = data;

	pw_log_debug("client-device %p: destroy", impl);

	impl->device = NULL;
	spa_hook_remove(&impl->device_listener);
	spa_hook_remove(&impl->resource_listener);
	spa_hook_remove(&impl->object_listener);
	pw_resource_destroy(impl->resource);
}

static void device_initialized(void *data)
{
	struct impl *impl = data;
	struct pw_impl_device *device = impl->device;
	struct pw_global *global = pw_impl_device_get_global(device);
	uint32_t id = pw_global_get_id(global);

	pw_log_debug("client-device %p: initialized global:%d", impl, id);
	pw_resource_set_bound_id(impl->resource, id);
}

static const struct pw_impl_device_events device_events = {
	PW_VERSION_IMPL_DEVICE_EVENTS,
	.destroy = device_destroy,
	.initialized = device_initialized,
};

struct pw_impl_device *pw_client_device_new(struct pw_resource *resource,
		struct pw_properties *properties)
{
	struct impl *impl;
	struct pw_impl_device *device;
	struct pw_impl_client *client = pw_resource_get_client(resource);
	struct pw_context *context = pw_impl_client_get_context(client);

	if (properties == NULL)
		properties = pw_properties_new(NULL, NULL);
	if (properties == NULL)
		return NULL;

	pw_properties_setf(properties, PW_KEY_CLIENT_ID, "%d",
			pw_impl_client_get_info(client)->id);

	device = pw_context_create_device(context, properties, sizeof(struct impl));
	if (device == NULL)
		return NULL;

	impl = pw_impl_device_get_user_data(device);
	impl->device = device;
	impl->context = context;
	impl->resource = resource;

	pw_impl_device_add_listener(impl->device,
			&impl->device_listener,
			&device_events, impl);

	pw_resource_add_listener(impl->resource,
				&impl->resource_listener,
				&resource_events,
				impl);
	pw_resource_add_object_listener(impl->resource,
				&impl->object_listener,
				&object_events,
				impl);

	return device;
}